Error get data from MS SQL Server


    I have a dbadapter connect MS SQL Server 2017. My table define columns with datatype is nvarchar.

    I have create store procedure get data from my table. But i excute it from BPEL i see error:


    Exception occurred when binding was invoked.

    Exception occurred during invocation of JCA binding: "JCA Binding execute of Reference operation 'dbReference' failed due to: Unimplemented string conversion.

    Conversion of JDBC type NVARCHAR to String is not supported.

    An attempt was made to convert a Java object to String using an unsupported JDBC type: NVARCHAR.

    Use a data type with a supported JDBC type.


    The invoked JCA adapter raised a resource exception.

    Please examine the above error message carefully to determine a resolution.


    My enviroment:

    - Oracle 12c (

    - JDBC 7.0 from Microsoft.